Beechcraft 58TC Baron — Maintenance Manual

This document is a Service Bulletin (SB 067) issued by Hartzell Engine Technologies, focusing on the replacement of the Wastegate Poppet Valve for specific turbocharger models used in the Beechcraft 58TC Baron and similar aircraft. It outlines the affected part numbers, compliance requirements, and corrective actions necessary to ensure continued airworthiness. The bulletin emphasizes the importance of using the most recent revisions of the document and applicable maintenance manuals to avoid unsafe conditions. It provides detailed instructions for inspection, replacement, and documentation of the work performed, ensuring that maintenance personnel are equipped with the necessary information to carry out the required tasks safely and effectively.

• Affected Poppet Valves include HET P/N 470892-0002, 470892-9002 and CMI P/N 635381-2, R-635381-2.
• Inspection required for valves with less than 100 hours TIS at the next scheduled inspection or within one year.
• For valves with 100 hours TIS or more, inspection must occur within the next 25 hours TIS.
• Replacement of affected Poppet Valves is necessary to prevent excessive corrosion and loss of manifold pressure.
• Up to 2 man hours are needed for removal, inspection, and replacement of the Poppet Valve assembly.